Title:
適応等化器、これを用いた光受信器、及び光伝送システム
Document Type and Number:
Japanese Patent JP7331657
Kind Code:
B2
Abstract:
An adaptive equalizer includes a sample buffer that temporarily stores data obtained by fractional sampling at a sampling rate that is larger than one time and smaller than two times a symbol rate; and a processor coupled to the sample buffer and configured to: specify position of a training sequence in the data based on a correlation value between a first set of (f×T) samples and a second set of (f×T) samples following the first set of samples, assuming that the sampling rate is f, and a symbol length of a code pattern included in the training sequence inserted in the data is T, and calculate an initial value of a tap coefficient set to a tap of an adaptive equalization filter based on the specified training sequence, wherein the symbol length is set to be changeable so that f×T is an integer.
Inventors:
Daisuke Sasaki
Hisao Nakajima
Nobukazu Koizumi
Hisao Nakajima
Nobukazu Koizumi
Application Number:
JP2019210775A
Publication Date:
August 23, 2023
Filing Date:
November 21, 2019
Export Citation:
Assignee:
富士通株式会社
International Classes:
H04B3/10; H03H21/00; H04B10/2507; H04B10/61
Domestic Patent References:
| JP2019161367A | ||||
| JP2017225078A | ||||
| JP2014060708A |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Tadahiko Ito